I have 4 Japanese Bantam Hens which I use for egg sitting. They go broody all the time and my Mixed breed egg layers never go broody. So I uses the Bantams to hatch my mixed breed eggs. Anyways, I saw a strange thing today. I usually seperate the Bantam and my Mixed Breed. They each have there own cages. Every few days I let the chickens out of there cages to roam for the day. I usually mix all the chicken together. I saw my mixed breed roo jump and have some fun with my Bantam Hen. This is a big size difference. Can my mixed breed Roo fertilize my Bantams eggs? Would they hatch? The Bantam was definitely not putting up a fight. It was like she was letting him.